Sacrificial water corrosion-resistant epoxy paint composition

A technology of anti-corrosion coatings and water-based epoxy, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as system instability and poor anti-corrosion performance, and achieve low prices, strong interface adhesion, and reduced cost effect

Inactive Publication Date: 2003-10-29
杨瑞影
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the ether bond generated by the esterification reaction will be hydrolyzed with time, the system will be unstable and phase separation will easily occur; Chinese patent CN1031550A mainly uses epoxy resin and acrylic monomer to react, and then the reaction product is mixed with vinyl monomer For example, styrene is copolymerized to make a good water-based coating, but its fatal disadvantage is poor corrosion resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add the mixed solvent of 50g epoxy resin E-44 and 24g ethylene glycol monobutyl ether and n-butanol (volume ratio 1: 1) in the reactor that nitrogen protection, stirring and temperature control device are housed, heat to 60 ℃, Add 21g of p-aminobenzoic acid, continue heating to 116°C, and stop the reaction at this temperature for 6.5 hours. The acid value of the obtained modified product is 90, and it is ready for use after washing and drying.

[0044] Sacrificial type waterborne paint composition is prepared by following steps and prescription:

[0045] (1) Weigh a certain amount of the above-mentioned modified epoxy resin according to the formula, add enamel and stir after dispersion and neutralization

[0046] In the mixing tank, add a certain amount of nano-organic montmorillonite, and stir at high speed for 10 minutes.

[0047] (2) Slowly add the weighed flake alloy powder along the cylinder wall of the mixing tank according to the formula to fill

[0048] ...

Embodiment 2

[0065] The reaction device and reaction conditions of epoxy resin modification are with embodiment 1, and reactant kind and consumption are respectively:

[0066] E-51 50g

[0067] Mixture of aminobenzoic acids 23.1g

[0068] 24.4 g of the solvent was reacted for 6.5 hours at a temperature of 116° C., and the acid value of the product was measured to be 76.40.

[0069] The preparation steps of the coating composition are the same as in Example 1, and the neutralizing agent used in this example is triethanolamine, and the others are the same as above. The dosage of each formulation in the coating composition:

[0070] Modified epoxy resin 10g

[0071] Dispersant (zero VOC) 4g

[0072] Neutralizer 2.1g

[0073] Solvent (water) 40g

[0074] Auxiliary solvent (n-butanol) 4g

[0075] Pigment (flaky alloy powder) 25g

[0076] Rheology additive 1g

[0077] Curing agent 2g

Embodiment 3

[0079] The reaction device and reaction conditions of epoxy resin modification are with embodiment 1, and reactant kind and consumption are respectively:

[0080] Epoxy resin E-44 19g

[0081] Anthranilic acid 5.73g

[0082] Solvent 12g

[0083] The reaction was carried out for 6.5 hours at a temperature of 116° C., and the acid value of the obtained product was 73.85.

[0084] The preparation steps of the coating composition are the same as in Example 1, and the neutralizing agent used in this example is dimethylethanolamine, and the others are the same as above. The dosage of each formulation in the coating composition:

[0085] Modified epoxy resin 10g

[0086] Dispersant (zero VOC) 3g

[0087] Neutralizer 1.8g

[0088] Solvent 35g

[0089] Auxiliary solvent 3.5g

[0090] Pigment 30g

[0091] Rheology modifier 1.2g

[0092] Curing agent 1.8g

[0093] In above-mentio...

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PUM

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Abstract

A sacrificial anticorrosion water epoxy paint composition contains water-dispersive basic epoxy resin, multi-metal alloy powder, water-soluble solidifying agent prepared from polyamine and polyol, and rheologic nano assistant. Its advantages are high stability, excellent anticorrosion and mechanical performance of its film, and no release of harmful gas.

Description

technical field [0001] Coatings, adhesives and polymer additives. technical background [0002] There are many ways to protect base metals (such as ships, bridges, aircraft and building components) from corrosion. Among them, coating anti-corrosion is widely used because of its simple construction, economical applicability, freedom from equipment area and shape, and certain decorative effects. Applications. At present, most of the coatings used in industry are solvent-based coatings, especially epoxy primers, most of which use xylene and n-butanol as solvents. These solvents have varying degrees of toxicity. When they volatilize, they not only cause environmental pollution, but also seriously endanger construction. the health of personnel. With the enhancement of people's awareness of environmental protection, new anti-corrosion coatings that do not contain organic solvents or low volatile organic compounds (low VOC) have been developed one after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D163/00
Inventor 杨瑞影万平玉刘小光陈咏梅杨晓波庞然许志凡
Owner 杨瑞影
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